The SCE was calibrated in the same 0.100 M NaOH electrolyte with the same
counter electrode and SCE. The hydrogen oxidation/reduction zero point was found in
both directions cycling between -0.96 V and -1.01 V at a rate of 10 mV/s, finding where the
current across a freshly polished (0.3 μm alumina) Pt flag electrode in blanketed/bubbled
hydrogen. The measured potential was −0.97015 V, so the potential versus RHE was
calculated by adding 0.97015 V to the potential measured versus SCE.
Materials Characterization
Materials in the paper were characterized identically to the paper this builds on, LaFe
x
Co
(1–x)
O3
Thin-Film Oxygen Reduction Catalysts Prepared Using Spray Pyrolysis without Conductive
Additives (Dervishogullari, D.; Sharpe, C.,; Sharpe, L. ACS Omega 2017, 2, 11, 7695-7701), and
so the characterization is quoted from that paper.
“All measurements were done at Iowa State University’s Materials Analysis and Research
Laboratory. The SEM data were collected at 15 kV on an FEI Quanta-250 scanning electron
microscope with a field emission gun. All images are from backscattered electrons. The energy-
dispersive X-ray spectrum was acquired with an Oxford Aztec energy-dispersive spectrometer
system with an X-Max 80 detector having light element capability. Samples were examined at a
low-vacuum setting of 80 Pa of water except for the edge image due to charging of the glass
substrate. The XRD data were measured on a Siemens D 500 diffractometer with a Cu X-ray
tube operated at 45 kV and 30 mA with medium-resolution slits and a diffracted beam
monochromator.”
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